300 lines
8.5 KiB
C
300 lines
8.5 KiB
C
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/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/crypto.h>
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#include "des_local.h"
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#include "spr.h"
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void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
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{
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register DES_LONG l, r, t, u;
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register DES_LONG *s;
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r = data[0];
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l = data[1];
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IP(r, l);
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/*
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* Things have been modified so that the initial rotate is done outside
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* the loop. This required the DES_SPtrans values in sp.h to be rotated
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* 1 bit to the right. One perl script later and things have a 5% speed
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* up on a sparc2. Thanks to Richard Outerbridge for pointing this out.
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*/
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/* clear the top bits on machines with 8byte longs */
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/* shift left by 2 */
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r = ROTATE(r, 29) & 0xffffffffL;
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l = ROTATE(l, 29) & 0xffffffffL;
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s = ks->ks->deslong;
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/*
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* I don't know if it is worth the effort of loop unrolling the inner
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* loop
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*/
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if (enc) {
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D_ENCRYPT(l, r, 0); /* 1 */
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D_ENCRYPT(r, l, 2); /* 2 */
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D_ENCRYPT(l, r, 4); /* 3 */
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D_ENCRYPT(r, l, 6); /* 4 */
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D_ENCRYPT(l, r, 8); /* 5 */
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D_ENCRYPT(r, l, 10); /* 6 */
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D_ENCRYPT(l, r, 12); /* 7 */
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D_ENCRYPT(r, l, 14); /* 8 */
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D_ENCRYPT(l, r, 16); /* 9 */
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D_ENCRYPT(r, l, 18); /* 10 */
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D_ENCRYPT(l, r, 20); /* 11 */
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D_ENCRYPT(r, l, 22); /* 12 */
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D_ENCRYPT(l, r, 24); /* 13 */
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D_ENCRYPT(r, l, 26); /* 14 */
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D_ENCRYPT(l, r, 28); /* 15 */
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D_ENCRYPT(r, l, 30); /* 16 */
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} else {
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D_ENCRYPT(l, r, 30); /* 16 */
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D_ENCRYPT(r, l, 28); /* 15 */
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D_ENCRYPT(l, r, 26); /* 14 */
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D_ENCRYPT(r, l, 24); /* 13 */
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D_ENCRYPT(l, r, 22); /* 12 */
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D_ENCRYPT(r, l, 20); /* 11 */
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D_ENCRYPT(l, r, 18); /* 10 */
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D_ENCRYPT(r, l, 16); /* 9 */
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D_ENCRYPT(l, r, 14); /* 8 */
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D_ENCRYPT(r, l, 12); /* 7 */
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D_ENCRYPT(l, r, 10); /* 6 */
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D_ENCRYPT(r, l, 8); /* 5 */
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D_ENCRYPT(l, r, 6); /* 4 */
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D_ENCRYPT(r, l, 4); /* 3 */
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D_ENCRYPT(l, r, 2); /* 2 */
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D_ENCRYPT(r, l, 0); /* 1 */
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}
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/* rotate and clear the top bits on machines with 8byte longs */
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l = ROTATE(l, 3) & 0xffffffffL;
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r = ROTATE(r, 3) & 0xffffffffL;
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FP(r, l);
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data[0] = l;
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data[1] = r;
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l = r = t = u = 0;
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}
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void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
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{
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register DES_LONG l, r, t, u;
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register DES_LONG *s;
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r = data[0];
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l = data[1];
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/*
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* Things have been modified so that the initial rotate is done outside
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* the loop. This required the DES_SPtrans values in sp.h to be rotated
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* 1 bit to the right. One perl script later and things have a 5% speed
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* up on a sparc2. Thanks to Richard Outerbridge for pointing this out.
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*/
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/* clear the top bits on machines with 8byte longs */
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r = ROTATE(r, 29) & 0xffffffffL;
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l = ROTATE(l, 29) & 0xffffffffL;
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s = ks->ks->deslong;
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/*
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* I don't know if it is worth the effort of loop unrolling the inner
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* loop
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*/
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if (enc) {
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D_ENCRYPT(l, r, 0); /* 1 */
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D_ENCRYPT(r, l, 2); /* 2 */
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D_ENCRYPT(l, r, 4); /* 3 */
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D_ENCRYPT(r, l, 6); /* 4 */
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D_ENCRYPT(l, r, 8); /* 5 */
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D_ENCRYPT(r, l, 10); /* 6 */
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D_ENCRYPT(l, r, 12); /* 7 */
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D_ENCRYPT(r, l, 14); /* 8 */
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D_ENCRYPT(l, r, 16); /* 9 */
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D_ENCRYPT(r, l, 18); /* 10 */
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D_ENCRYPT(l, r, 20); /* 11 */
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D_ENCRYPT(r, l, 22); /* 12 */
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D_ENCRYPT(l, r, 24); /* 13 */
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D_ENCRYPT(r, l, 26); /* 14 */
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D_ENCRYPT(l, r, 28); /* 15 */
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D_ENCRYPT(r, l, 30); /* 16 */
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} else {
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D_ENCRYPT(l, r, 30); /* 16 */
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D_ENCRYPT(r, l, 28); /* 15 */
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D_ENCRYPT(l, r, 26); /* 14 */
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D_ENCRYPT(r, l, 24); /* 13 */
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D_ENCRYPT(l, r, 22); /* 12 */
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D_ENCRYPT(r, l, 20); /* 11 */
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D_ENCRYPT(l, r, 18); /* 10 */
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D_ENCRYPT(r, l, 16); /* 9 */
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D_ENCRYPT(l, r, 14); /* 8 */
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D_ENCRYPT(r, l, 12); /* 7 */
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D_ENCRYPT(l, r, 10); /* 6 */
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D_ENCRYPT(r, l, 8); /* 5 */
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D_ENCRYPT(l, r, 6); /* 4 */
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D_ENCRYPT(r, l, 4); /* 3 */
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D_ENCRYPT(l, r, 2); /* 2 */
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D_ENCRYPT(r, l, 0); /* 1 */
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}
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/* rotate and clear the top bits on machines with 8byte longs */
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data[0] = ROTATE(l, 3) & 0xffffffffL;
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data[1] = ROTATE(r, 3) & 0xffffffffL;
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l = r = t = u = 0;
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}
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void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,
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DES_key_schedule *ks2, DES_key_schedule *ks3)
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{
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register DES_LONG l, r;
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l = data[0];
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r = data[1];
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IP(l, r);
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data[0] = l;
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data[1] = r;
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DES_encrypt2((DES_LONG *)data, ks1, DES_ENCRYPT);
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DES_encrypt2((DES_LONG *)data, ks2, DES_DECRYPT);
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DES_encrypt2((DES_LONG *)data, ks3, DES_ENCRYPT);
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l = data[0];
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r = data[1];
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FP(r, l);
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data[0] = l;
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data[1] = r;
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}
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void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,
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DES_key_schedule *ks2, DES_key_schedule *ks3)
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{
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register DES_LONG l, r;
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l = data[0];
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r = data[1];
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IP(l, r);
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data[0] = l;
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data[1] = r;
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DES_encrypt2((DES_LONG *)data, ks3, DES_DECRYPT);
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DES_encrypt2((DES_LONG *)data, ks2, DES_ENCRYPT);
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DES_encrypt2((DES_LONG *)data, ks1, DES_DECRYPT);
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l = data[0];
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r = data[1];
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FP(r, l);
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data[0] = l;
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data[1] = r;
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}
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#ifndef DES_DEFAULT_OPTIONS
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# undef CBC_ENC_C__DONT_UPDATE_IV
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# include "ncbc_enc.c" /* DES_ncbc_encrypt */
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void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
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long length, DES_key_schedule *ks1,
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DES_key_schedule *ks2, DES_key_schedule *ks3,
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DES_cblock *ivec, int enc)
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{
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register DES_LONG tin0, tin1;
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register DES_LONG tout0, tout1, xor0, xor1;
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register const unsigned char *in;
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unsigned char *out;
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register long l = length;
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DES_LONG tin[2];
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unsigned char *iv;
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in = input;
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out = output;
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iv = &(*ivec)[0];
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if (enc) {
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c2l(iv, tout0);
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c2l(iv, tout1);
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for (l -= 8; l >= 0; l -= 8) {
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c2l(in, tin0);
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c2l(in, tin1);
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tin0 ^= tout0;
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tin1 ^= tout1;
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tin[0] = tin0;
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tin[1] = tin1;
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DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3);
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tout0 = tin[0];
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tout1 = tin[1];
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l2c(tout0, out);
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l2c(tout1, out);
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}
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if (l != -8) {
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c2ln(in, tin0, tin1, l + 8);
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tin0 ^= tout0;
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tin1 ^= tout1;
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tin[0] = tin0;
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tin[1] = tin1;
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DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3);
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tout0 = tin[0];
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tout1 = tin[1];
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l2c(tout0, out);
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l2c(tout1, out);
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}
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iv = &(*ivec)[0];
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l2c(tout0, iv);
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l2c(tout1, iv);
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} else {
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register DES_LONG t0, t1;
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c2l(iv, xor0);
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c2l(iv, xor1);
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for (l -= 8; l >= 0; l -= 8) {
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c2l(in, tin0);
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c2l(in, tin1);
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t0 = tin0;
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t1 = tin1;
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tin[0] = tin0;
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tin[1] = tin1;
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DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3);
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tout0 = tin[0];
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tout1 = tin[1];
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tout0 ^= xor0;
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tout1 ^= xor1;
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l2c(tout0, out);
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l2c(tout1, out);
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xor0 = t0;
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xor1 = t1;
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}
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if (l != -8) {
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c2l(in, tin0);
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c2l(in, tin1);
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t0 = tin0;
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t1 = tin1;
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tin[0] = tin0;
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tin[1] = tin1;
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DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3);
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tout0 = tin[0];
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tout1 = tin[1];
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tout0 ^= xor0;
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tout1 ^= xor1;
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l2cn(tout0, tout1, out, l + 8);
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xor0 = t0;
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xor1 = t1;
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}
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iv = &(*ivec)[0];
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l2c(xor0, iv);
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l2c(xor1, iv);
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}
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tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
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tin[0] = tin[1] = 0;
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}
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#endif /* DES_DEFAULT_OPTIONS */
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